What are the three reasons Socrates refuse to escape prison

Socrates was charged of not honoring the gods of Athens and of corrupting the youth. He received the death sentence for moral corruption and impiety. His refusal to escape was because:

1 - to flee would idicate a fear of death, which he didn't have.

2 - escaping would make his friends liable in law.

3 - this could cause him to break his "social contract" with the state, and he didn't want to harm the state.